Bigworld, In addition to the cheap labor, the bigger reason for wide open borders is to dilute the national character until there is no national character. The NWO goal is to end the modern nation state in favor of weak micro states that can be easily dominated by a world government. A strong homogenous national character doesn't fit into that model.
There are a lot of advantages to having a steady flow of immigrants coming to the US, but it needs to be more orderly to allow time for assimilation.
Immigration helps with the demographics. Many countries are facing huge demographic cliffs due to their low birthrates and aging populations (Japan, Russia, China, Europe). Having so many young people willing to come to the US is actually a big advantage that we have.
But the NWO ghouls are flooding the country for completely different reasons that are totally nefarious.